Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 190 · 40 questions

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

1. 1.Check with nines: 72 × 33 = 2376. Correct or wrong? (a) wrong (b) correct
2. 2.27 × 15 =
3. 3.62 × 15 =
4. 4.39² =
5. 5.98 × 5 =
6. 6.447 − 76 =
7. 7.Check with nines: 245 + 143 = 388. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 466 + 396 = 862. Correct or wrong? (a) correct (b) wrong
9. 9.975 ÷ 25 =
10. 10.179 + 19 =
11. 11.66 × 50 =
12. 12.Best estimate of 42 × 58? (a) 4800 (b) 24000 (c) 240 (d) 2400
13. 13.19² =
14. 14.210 − 79 =
15. 15.29² =
16. 16.₹35.45 − ₹15.80 =
17. 17.Best estimate of 97 × 7? (a) 70 (b) 7000 (c) 1400 (d) 700
18. 18.3 + 9 + 8 + 1 =
19. 19.33 × 15 =
20. 20.239 − 78 =
21. 21.Best estimate of 62 × 39? (a) 240 (b) 24000 (c) 4800 (d) 2400
22. 22.58 × 5 =
23. 23.19 × 14 =
24. 24.169 − 76 =
25. 25.12 × 16 =
26. 26.59 + 81 + 36 + 26 =
27. 27.Best estimate of 91 × 71? (a) 63000 (b) 6300 (c) 630 (d) 12600
28. 28.13 × 15 =
29. 29.Check with nines: 56 × 73 = 4088. Correct or wrong? (a) correct (b) wrong
30. 30.190 ÷ 5 =
31. 31.12 × 5 =
32. 32.465 + 87 =
33. 33.4 + 6 + 2 + 4 =
34. 34.31 × 4 =
35. 35.39² =
36. 36.1 + 9 + 1 + 5 =
37. 37.₹31.50 + ₹6.95 =
38. 38.18 + 81 + 52 + 70 =
39. 39.17 × 19 =
40. 40.66 + 18 + 44 + 37 =

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